Nonlinear shape normalization methods for the recognition of large-set handwritten characters

Seong Whan Lee, Jeong Seon Park

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)


Recently, several nonlinear shape normalization methods have been proposed in order to compensate for shape distortions in large-set handwritten characters. In this paper, these methods are reviewed from the two points of view: feature projection and feature density equalization. The former makes feature projection histogram by projecting a certain feature at each point onto horizontal- or vertical-axis and the latter equalizes the feature densities of input image by re-sampling the feature projection histogram. Then, the results of quantitative evaluation for these methods are presented. These methods have been implemented on a PC in C language and tested with a large variety of handwritten Hangul syllables. A systematic comparison of them has been made based on the following criteria: recognition rate, processing speed, computational complexity and degree of variation.

Original languageEnglish
Pages (from-to)895-902
Number of pages8
JournalPattern Recognition
Issue number7
Publication statusPublished - 1994 Jul
Externally publishedYes


  • Feature density equalization
  • Feature projection
  • Handwritten character recognition
  • Nonlinear shape normalization
  • Performance evaluation

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Computer Vision and Pattern Recognition
  • Artificial Intelligence


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